Patent · US Active

Progressive spectacle lens having a variable refractive index and method for the design and production thereof

US10989932B2 · kind B2 · utility

0Cited by

10References

10Claims

0Family size

Assignee

Carl Zeiss Vision International GmbH · DE

Inventors

Gerhard Kelch · Aalen, DE
Christoph Menke · Oberkochen, DE
Helmut Wietschorke · Laberweinting, DE

Key dates

Filing date	Nov 22, 2019
Grant date	Apr 27, 2021
Priority date	—
Expiry date	Nov 22, 2039

Classification

Technology area (CPC G)Physics
CPC primaryG02C2202/12
WIPO fieldOptics
WIPO sectorInstruments

Abstract

A product includes a progressive power spectacle lens or a representation, stored on a data storage medium, of the progressive power spectacle lens. The progressive power spectacle lens has a front surface and a back surface and a spatially varying refractive index, wherein the front surface and/or the back surface is embodied as a progressive surface. The front surface is formed as a free-form surface in such a way that the maximum of the absolute value of the mean curvature of the front surface lies in the intermediate corridor and/or the back surface is formed as a free-form surface in such a way that the minimum of the absolute value of the mean curvature of the back surface lies in the intermediate corridor. Further, a computer-implemented method for planning a progressive power spectacle lens with a spatially varying refractive index and a progressive surface is disclosed.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.